http://www.nydailynews.com/news/national/suspect-trooper-dea...

Tyrone Harris Jr. fired shots at an unmarked police car, then died in a shootout with the police. He didn't manage to actually kill anyone though. https://en.wikipedia.org/wiki/Ferguson_unrest#Tyrone_Harris_....

Jeffrey Williams shot two police officers in relation to BLM protests and demonstrations in Ferguson. Naturally BLM disavowed him.

http://www.huffingtonpost.com/2015/03/16/williams-ferguson-p...

Micah Johnson killed 5 officers and wounded several others http://www.nationalreview.com/article/437694/black-lives-mat...

There's a few others, but it's hard to find reliable sources because the mainstream media has, as I explicitly called them out for, avoided associating these acts of violence with their group identities.